Product DescriptionConstruction Genesis® Plenum Rated Unshielded Fire Alarm Cable features the following quality and convenience characteristics: Bare Copper conductors for excellent conductivity and low voltage drop. Low-Smoke PVC insulation. Plenum PVC jacket. Durable rip cord for efficient jacket stripping and removal. Countdown® Length Markings for easy tracking of usage and remaining cable. Rated for 300 Volts Rated for -20 °C to 75 °C.